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350matt, Engineer - BEng Hons
Category: Saab
Satisfied Customers: 21989
Experience:  Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
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Saab: 1999 5-3 convertable changed out the two O-sensors and

Customer Question

1999 5-3 convertable changed out the two O-sensors and it still over heats! Could it be that it might need a new battery
Submitted: 2 years ago.
Category: Saab
Expert:  350matt replied 2 years ago.
I'd suggest using a thermal probe / sensor to check what temperature the engine actually is as its possible that the coolant temperature sensor is faulty or the wiring to it is damaged and its producing artificially high signal